The major function of the large intestine is to absorb water from the remaining indigestible food matter and transmit the useless waste material from the body.
With spinal cord injury if you injure the cervical or thoracic areas, it will affect breathing, could cause you to breath with intercostal muscles because diaphragm doesn't function or cause paralysis.
traumatic brain injury can leave injuries to multiple areas. could cause shock, death, heart issues, and so on.